|Table of Contents|

Elemental Geochemical Characteristics of Tonglushan Skarn-type Cu-Fe-Au Deposit in the Southeastern Hubei, China and Their Geological Implications(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2019年第04期
Page:
431-444
Research Field:
基础地质与矿产地质
Publishing date:

Info

Title:
Elemental Geochemical Characteristics of Tonglushan Skarn-type Cu-Fe-Au Deposit in the Southeastern Hubei, China and Their Geological Implications
Author(s):
WANG Min-fang1;  SHANG Xiao-yu1;  WEI Ke-tao2;  LIU Dong-qin2;  ZHANG Fu-cheng1
(1. School of Earth Resources, China University of Geosciences, Wuhan 430074, Hubei, China; 2. The First Geological Team of Hubei Geological Bureau, Daye 435100, Hubei, China)
Keywords:
Cu-Fe-Au deposit;  element geochemistry;  skarn;  quartz monzodiorite;  metallogenic stage;  ore-forming fluid;  alteration;  Hubei
PACS:
P618.4; P614
DOI:
-
Abstract:
Tonglushan skarn-type Cu-Fe-Au deposit is located in the southeastern Hubei of the western Middle-lower Yangtze River Fe-Cu metallogenic belt. The main ore bodies of Tonglushan deposit distribute along the contacting zones and faults between Yanshanian diorites, and marbles and dolomitic marbles of Lower Triassic Daye Formation. Ore bodies occur as stratoid, lenticular and vein. Based on the detailed metallogenic geological background and systematic sampling, the quartz monzodiorite and mineral samples in different metallogenic stages, which are skarn, retrograde alteration, oxide, sulfide and carbonate stages, were analyzed by the major, trace and rare earth elements, and the geological characteristics of ore-forming fluids were discussed by element geochemistry. The results show that Fe and Mn are taken out from the fluid and deposit in the suitable position; the increase of MgO content and decrease of CaO content during the mineralization indicate that the mineralization may be related with magnesium skarn; the ratios of Hf/Sm change from less than 1 in the early metallogenic stage to more than 1 in the later metallogenic stage, implying mainly F-rich fluid in the later metallogenic stage, and the wide distribution of chalcopyrite ores in diopside skarns and fluorite veins cutting the former magnetite ores supports this conclusion; the total contents of REE decrease from the quartz monzodiorite to samples in different metallogenic stages, and the higher total contents of REE in retrograde alteration stage probably mean REE mineralization in it.

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Last Update: 2019-07-11